US3312818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speed control system
Assignee: —
•
Filing: —
•
Granted: 1967-04-04
•
Expires: 1984-04-04
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:22
CPC Classifications
H; H02; H02P; H02P27/00; H02P27/04; H02P27/16; B; B60; B60L; B60L15/00; B60L15/20; B60L2200/00; B60L2200/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A SPEED CONTROL SYSTEM FOR A BODY HAVING A ROTATING MEMBER THE SPEED OF WHICH IS TO BE CONTROLLED ACCORDING TO A CODED OR MODULATED ALTERNATING CURRENT COMMAND SPEED SIGNAL INDICATIVE OF THE DESIRED SPEED, SAID SYSTEM COMPRISING: (A) MEANS FOR DETECTING THE ALTERING CURRENT COMMAND SPEED SIGNAL; (B) MEANS RECEIVING THE ENERGY FROM SAID DETECTING MEANS FOR AMPLIFYING AND TRANSLATING SAID ENERGY TO PRODUCE A MULTIPHASE ALTERNATING CURRENT OUTPUT AT A FREQUENCY PROPORTIONAL TO SAID COMMAND SPEED SIGNALS, THE VOLTAGE OF SAID MULTIPHASE OUTPUT HAVING A DIRECT RELATIONSHIP TO THE FREQUENCY THEREOF; (C) SPEED COMPARISON MEANS ENERGIZED BY SAID MULTIPHASE OUTPUT AND HAVING AN INPUT PROPORATIONAL TO THE ACTUAL SPEED OF SAID ROTATING MEMBER TO PRODUCE A MULTIPHASE OUTPUT AT A FREQUENCY PROPORTIONAL TO THE DIFFERENCE BETWEEN THE SPEED INDICATED BY SAID COMMAND SPEED SIGNAL AND THE ACTUAL SPEED;
Claim 2
Dependent Claim
140 words
A SPEED CONTROL SYSTEM FOR A BODY HAVING A ROTATING MEMBER THE SPEED OF WHICH IS TO BE CONTROLLED ACCORDING TO A CODED OR MODULATED ALTERNATING CURRENT COMMAND SPEED SIGNAL INDICATIVE OF THE DESIRED SPEED, SAID SYSTEM COMPRISING: (A) MEANS FOR DETECTING THE ALTERING CURRENT COMMAND SPEED SIGNAL; (B) MEANS RECEIVING THE ENERGY FROM SAID DETECTING MEANS FOR AMPLIFYING AND TRANSLATING SAID ENERGY TO PRODUCE A MULTIPHASE ALTERNATING CURRENT OUTPUT AT A FREQUENCY PROPORTIONAL TO SAID COMMAND SPEED SIGNALS, THE VOLTAGE OF SAID MULTIPHASE OUTPUT HAVING A DIRECT RELATIONSHIP TO THE FREQUENCY THEREOF; (C) SPEED COMPARISON MEANS ENERGIZED BY SAID MULTIPHASE OUTPUT AND HAVING AN INPUT PROPORATIONAL TO THE ACTUAL SPEED OF SAID ROTATING MEMBER TO PRODUCE A MULTIPHASE OUTPUT AT A FREQUENCY PROPORTIONAL TO THE DIFFERENCE BETWEEN THE SPEED INDICATED BY SAID COMMAND SPEED SIGNAL AND THE ACTUAL SPEED;
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-04-03 | 1970-10-03 | 1971-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-03 | 1974-10-03 | 1975-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-03 | 1978-10-03 | 1979-04-04 | $7700.00 | Window Closed / Lapsed |